One of the current problems in environmental catalysis is design an effective and less costly catalytic system for oxidation CO. The nano-sized α-Mn2O3 oxide has been prepared modified with 0.5 wt.% Pt. catalysts have characterized by X-ray diffraction (XRD), photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), temperature-programmed reduction (TPR) diffuse-reflectance infr...

We have studied the effect of different supports (CeO2, ZrO2, SiC, SiO2 and Al2O3) on catalytic performance phase stability Co3O4 nanoparticles during preferential oxidation CO (CO-PrOx) under H2-rich gas environments temperatures. Our results show that Co3O4/ZrO2 has superior activity, but transforms to Co0 consequently forms CH4 at relatively low The least reduced methanation active catalyst ...

Density functional theory is used to determine the reaction mechanisms of CO oxidation and the active oxygen species on a Au/TiO2 model catalyst. The model consists of a Au rod supported along the TiO2 [11̅0] direction of the TiO2(110) surface. An interfacial Au/Ti5c site at the interface boundary is identified to be particularly active toward O2 adsorption and dissociation. At this site, O2 dis...

Reducing the operating temperature of oxidation catalysts is important for designing energy efficient processes, extending catalyst lifetime, and abating pollutants, especially in cold climates. Herein, high CO activity at sub-ambient temperatures reported Pt/CeO2 with content Pt form dispersed Pt2+ Pt4+ centers. Whereas reference 1 wt%Pt was active only above 100ᵒC, 8 20 converted 60 90 % CO, ...

Ce oxide-based catalysts with different molar ratio of Co/Ce (denoted as CoCe-x, x represents the Co to ratio) were examined catalyst 5-hydroxymethylfurfural (5-HMF) oxidation 2,5-furandicarboxylic acid (FDCA). The ratio, amount and reaction temperature all have remarkable effects on yield selectivity. Complete conversion 5-HMF 86.3 % selectivity FDCA has been achieved over CoCe-0.15 at 130 °C ...

In this paper, catalytic oxidation of CO over the LaFe1-xCuxO3 (x= 0, 0.2, 0.4, 0.6) perovskite-type oxides was investigated. The catalysts were synthesized by sol-gel method and characterized by XRD, BET, FT-IR, H2-TPR and SEM methods. The catalytic activity of catalysts was tested in catalytic oxidation of CO. XRD patterns confirmed the synthesized perovskites to be single-phase perovskite-ty...

Single-atom catalysts have attracted much interest recently because of their excellent stability, high catalytic activity, and remarkable atom efficiency. Inspired by the recent experimental discovery of a highly efficient single-atom catalyst Pd1/γ-Al2O3, we conducted a comprehensive DFT study on geometries, stabilities and CO oxidation catalytic activities of M1/γ-Al2O3 (M=Pd, Fe, Co, and Ni)...

Abstract Mn-based catalysts for soot oxidation have been developed without noble metals. The compositions are LaMn 0.9 Co 0.1 O 3 , La K Mn (LKMC), Sr and K/La : provides stability to the structure both in oxidizing reducing atmospheres efficiently exchanges oxygen. Moreover, doping enhances oxidation. Adding or as A-site cation perovskite composition allows comparing behaviors of so-obtained p...

Recently, graphical representations of aerosol mass spectrometer (AMS) spectra and elemental composition have been developed to explain the oxidative and aging processes of secondary organic aerosol (SOA). It has been shown previously that oxygenated organic aerosol (OOA) components from ambient and laboratory data fall within a triangular region in the f44 vs. f43 space, where f44 and f43 are ...